摘要
通过对西双版纳热带雨林，砍伐后４块处于次生性演替恢复阶段，不同年代林中，所设固定样地中昆虫群落的定时、定点和定量采集观测，对群落中昆虫的数量、种类、群落的多样性、优势度和稳定性进行了分析比较。从年度变化看：昆虫个体数和植食性昆虫数在雨季是最大的。优势度在演替阶段后期是雨季大于旱季，而在前期则是旱季大于雨季。多样性和均匀性在演替后期是旱季大于雨季，而演替前期则是雨季大于旱季。从演替年代变化看：随着演替年代的递增，昆虫群落的多样性、均匀性和稳定性有增加的趋势，而昆虫数量和植食性昆虫数量减少的趋势。对昆虫群落稳定性的讨论，试引入“变异系数”进行讨论。
our different successional plots were set up in Menglun of Xishuangbanna in 1989 ,thetotal area was 2500m￣2. Insects were collected in the same way(800 nets for every plot). Thedominance, homegeneity, stability and diversity of the insects community were analysed. They were compared one another in different plots. Four plots shared samilar characteristicsin annual change. The number of insects in rain season is more than that in dry season. Inearly successional stage, the insect dominance in the rain season is smaller than that of dryseason, but the evenness, stability and diversity of rain season are larger than those of dryseason. In the later successional stage, the change of these index are quite contrary. The diversity, evenness and stability get higher with the increase of successional stage,but the number of insects and phytophages decreases with the increase of successional stage. The coefficient of variation was used in discussing the stability of insect community.
出处
《生态学报》
CAS
CSCD
北大核心
1995年第4期373-377,共5页
Acta Ecologica Sinica
基金
国家自然科学基金
关键词
森林植物
热带雨林
次生演替
昆虫群落
tropical rain- fores,secondary succession, insect community.
